<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0187-7151</journal-id>
<journal-title><![CDATA[Acta botánica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Act. Bot. Mex]]></abbrev-journal-title>
<issn>0187-7151</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C., Centro Regional del Bajío]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-71512024000100124</article-id>
<article-id pub-id-type="doi">10.21829/abm131.2024.2338</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Una nueva Asclepias (Apocynaceae, Asclepiadoideae) de la Sierra Gorda, Guanajuato-Querétaro, México]]></article-title>
<article-title xml:lang="en"><![CDATA[A new Asclepias (Apocynaceae, Asclepiadoideae) from the Sierra Gorda, Guanajuato-Querétaro, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvarado-Cárdenas]]></surname>
<given-names><![CDATA[Leonardo O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Islas-Hernández]]></surname>
<given-names><![CDATA[Carla Sofía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[Cd. Mx ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<numero>131</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-71512024000100124&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-71512024000100124&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-71512024000100124&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes y Objetivos: Asclepias es un grupo de alta diversidad dentro de Apocynaceae, con 78 especies en México, siendo el taxón más diverso de la familia en este país. Debido a su compleja morfología y similitudes en los caracteres florales, algunos taxones han sido erróneamente identificados. En el presente trabajo se describe una nueva especie para el género.  Métodos: Se colectaron individuos en la Sierra Gorda que no se pudieron asignar a especies conocidas. Se revisaron herbarios nacionales y extranjeros, bases de datos digitales y literatura especializada, para comparar los especímenes colectados con especies similares. Se realizaron expediciones a campo en 2018 y 2023 para la recolecta y monitoreo de la fenología de la especie de interés. Se planteó como hipótesis explicativa el concepto cohesivo de especie para el reconocimiento de los taxones aquí tratados. El estado de conservación se asignó siguiendo los criterios de la IUCN.  Resultados: Se describe una nueva especie de Asclepias, conocida en los estados de Guanajuato y Querétaro, que se distribuye en bosque de pino, de encino y mesófilo. Se diferencia de especies similares por su corona ginostegial con capuchones campanulados de base redondeada, cornículos lineares a linear-lanceolados surgiendo de la base del capuchón. Se incluyen láminas fotográficas y un mapa de distribución, una clave dicotómica con las especies similares, así como las distribuidas en los estados de Guanajuato y Querétaro. Con base en su área de distribución reducida y hábitat impactado, se considera una especie en peligro de acuerdo con los criterios de la IUCN.  Conclusiones: En México, Asclepias alcanza 79 especies, reafirmando al país como un centro de diversidad para el género. La nueva especie forma un grupo morfológicamente complejo con las especies aquí comparadas, por lo que había pasado desapercibida e identificada erróneamente. La revisión detallada de la morfología permitió sugerir estas plantas como una hipótesis de especie diferente del resto.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background and Aims: Asclepias is a highly diverse genus within Apocynaceae, with 78 species in Mexico, being the most diverse taxon of the family in the country. Due to its complex morphology and similarities in floral characters, some taxa have been misidentified. In the present work, a new species is described for the genus.  Methods: Individuals were collected in the Sierra Gorda that could not be assigned to known species. National and foreign herbaria, digital databases, and specialized literature were reviewed to compare the collected specimens with similar species. Field expeditions were conducted in 2018 and 2023 to collect and monitor the phenology of the species of interest. The cohesive species concept was proposed as an explanatory hypothesis for the recognition of the taxa treated here. The conservation status was assigned following the IUCN criteria.  Results:  A new species of Asclepias is described, known from the states of Guanajuato and Querétaro, distributed in pine, oak, and cloud forests. It differs from similar species by its gynostegial corona with bell-shaped hoods of rounded base, and linear to linear-lanceolate cornicles emerging from the base of the hood. Photographic plates, a distribution map, and a comparative plate between similar species are included, as well as a dichotomous key with similar species and those distributed in the states of Guanajuato and Querétaro. Based on its reduced distribution area and impacted habitat, it is considered a species at risk according to IUCN criteria.  Conclusions: In Mexico, Asclepias includes 79 species, reaffirming the country as a center of diversity for the genus. The new species forms a morphologically complex group with the species compared here, so it has gone unnoticed and been identified erroneously. The detailed review of morphology allowed suggesting these plants as a hypothesis of a species different from the rest.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Asclepiadeae]]></kwd>
<kwd lng="es"><![CDATA[cornículos]]></kwd>
<kwd lng="es"><![CDATA[corona ginostegial]]></kwd>
<kwd lng="es"><![CDATA[endemismo]]></kwd>
<kwd lng="en"><![CDATA[Asclepiadeae]]></kwd>
<kwd lng="en"><![CDATA[endemism]]></kwd>
<kwd lng="en"><![CDATA[gynostegial corona]]></kwd>
<kwd lng="en"><![CDATA[horns]]></kwd>
</kwd-group>
</article-meta>
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<publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[New York Botanical Garden&#8217;s Virtual Herbarium]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<collab>Tropicos</collab>
<source><![CDATA[Tropicos.org]]></source>
<year>2023</year>
<publisher-name><![CDATA[Missouri Botanical Garden]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<collab>Tropicos</collab>
<source><![CDATA[Tropicos.org]]></source>
<year>2023</year>
<publisher-name><![CDATA[Missouri Botanical Garden.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<collab>Tropicos</collab>
<source><![CDATA[Tropicos.org]]></source>
<year>2023</year>
<publisher-name><![CDATA[Missouri Botanical Garden]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Woodson]]></surname>
<given-names><![CDATA[R. E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The North American species of Asclepias L]]></article-title>
<source><![CDATA[Annals of the Missouri Botanical Garden]]></source>
<year>1954</year>
<volume>41</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-211</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
